|Table of Contents|

Cross Stochastic Fourier Spectrum Function of Turbulence Wind Velocity(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2006年02期
Page:
57-61
Research Field:
Publishing date:
2006-06-20

Info

Title:
Cross Stochastic Fourier Spectrum Function of Turbulence Wind Velocity
Author(s):
ZHANG Lin-lin;  LI Jie
Department of Architectural Engineering, Tongji University, Shanghai 200092, China
Keywords:
cross stochastic Fourier spectrum;  coherence function;  groundroughness degree;  basic wind velocity
PACS:
TU973.32
DOI:
-
Abstract:
In order to consider the spatial correlation of wind field within the stochastic Fourier spectrum, cross stochastic Fourier spectrum was defined onthe basis of the meaning of empirical physical relationship. The formula of thecross stochastic Fourier spectrum consisted of two stochastic Fourier spectrum functions of two stochastic processes and their stochastic coherence function, which could be used to reflect the spatial correlation of wind field. Then, the empirical physical model of the stochastic coherence function of real wind field was researched and established by means of the real wind field data. Finally, the basic parameters and their probability density functions within the stochastic coherence function were determined based on the hypothesis testing theory. It is demonstrated that the proposed cross stochastic Fourier spectrum function can represent the spatial correlation very well in terms of probability.

References:

[1] 武 岳,陈 波,沈世钊.大跨度屋盖结构等效静风荷载研究[J].建筑科学与工程学报,2005,22(4):27-31. WU Yue,CHEN Bo,SHEN Shi-zhao.Research on Equivalent Static Wind Loadings of Large-Span Roof Structures[J].Journal of Architecture and Civil Engineering,2005,22(4):27-31.
[2] 刘健新,李加武.中国西部地区桥梁风工程研究[J].建筑科学与工程学报,2005,22(4):32-39. LIU Jian-xin,LI Jia-wu.Study of Wind Project of Bridge in Western Area of China[J].Journal of Architecture and Civil Engineering,2005,22(4):32-39.
[3] JORGEN H.Spectral Coherence in Wind Turbine Wakes[J].J Wind Eng Ind Aerodyn,1999,80(1):137-146.
[4] DAVENPORT A G.The Spectrum of Horizontal Gustiness near the Groundin High Winds[J].J Royal Meteorol Soc,1961,87(1):194-211.
[5] SIMIU E,SCANLAN R H.Wind Effects on Structures:an Introduction toWind Engineering[M].New York:Wiley,1978.
[6] PANOFSKY H A,SINGER I A.Vertical Structure of Turbulence[J].J Royal Meteorol Soc,1965,91(1):339-344.
[7] VICKERY B J.On the Reliability of Gust Loading Factors[C]∥National Bureau of Standards.Proceedings of the Technical Meeting Concerning Wind Loads on Buildings and Structures.Washington D C:National Bureau of Standards,1970:93-104.
[8] DAVENPORT A G.The Dependence of Wind Load upon Meteorological Parameters[C]∥University of Toronto.Proceeding of the International Research Seminar on Wind Effects on Buildings and Structures.Toronto:University of Toronto Press,1968:19-82.
[9] 陈希孺,倪国熙.数理统计学教程[M].上海:上海科学技术出版社,1988. CHEN Xi-ru,NI Guo-xi.Tutorial of Mathematical Statistics[M].Shanghai:Shanghai Scienceand Technology Press,1988.
[10] 李 杰,张琳琳.脉动风速功率谱与随机Fourier幅值谱的关系研究[J].防灾减灾工程学报,2004,24(4):363-369. LI Jie,ZHANG Lin-lin.A Study on the Relationship Between Turbulence Power Spectrum and Stochastic Fourier Amplitude Spectrum[J].Journal of Disaster Prevention and Mitigation Engineering,2004,24(4):363-369.

Memo

Memo:
-
Last Update: 2006-06-20